Effect of flaxseed oil, animal fat, and vitamin E supplementation on growth performance, serum metabolites, and carcass characteristics of finisher pigs, and physical characteristics of pork

Effect of High Dietary Level (8%) of Fish Oil on Long-Chain Polyunsaturated Fatty Acid n-3 Content in Pig Tissues and Plasma Biochemical Parameters

“…Liu and Kim [ 6 ] also found that a different PUFA n-6/n-3 ratio in a pig diet had no effect on meat ( longissimus muscle) color. Moreover, both Liu and Kim [ 6 ] and Huang et al [ 20 ] reported no effect of different PUFA n-6/n-3 ratios and high dietary lipid content, respectively, on the ultimate pH value or drip loss of the muscles of pigs, which is in agreement with our results ( Table 4 ).…”

“…On the other hand, a high dietary flaxseed oil and poultry fat diet (6%) in comparison with the diet without added fat only tended to increase serum urea (from 2.50 to 2.76 µmol/L) in the study of Huang et al [20], but the increase in the F-pigs was significant in the present experiment (2.17 vs. 2.83 µmol/L). Huang et al [20] mentioned a possible serum urea nitrogen decrease with the increasing efficiency of feed utilization. The lower efficiency of energy utilization can be a partial explanation for the significant increase of plasma urea in F-pigs.…”

“…It is plausible that it is not fatty acid composition but rather the sheer amount of fat in the F-diet (much higher than in the control diet) that is the reason for the TAG increase. Huang et al [ 20 ] came to the same conclusion using diets with either 0% or 6% of added lipid, which resulted in a significant ( p < 0.05) increase in the plasma TAG in pigs fed a fatty diet (0.40 vs. 0.49 mmol L −1 ). Dietary lipid supplementation also increased the serum TAG in pigs in the study of Adhikary et al [ 23 ].…”

“…The fattening interval usually lasts from four weeks ( [11]; the present experiment) to eight weeks [12,14,19] to as long as 22 weeks [20].…”

“…Regarding the performance traits (Table 3), according to [20], body weight gain is dependent on (among other factors) the available energy content of the diet. Because the fat (and consequently metabolizable energy) content of the F-diet was higher in the present experiment, not energy, but lower crude protein content of the F-diet (Table 1) can possibly explain the lower daily weight gain of the F-pigs in comparison with controls.…”